John had been serving overseas for the past two years. He left behind his sister, whom he was very close to. He arrives back home, hoping to enjoy some peace and quiet, only to find out everything has gone downtown in the Colorado town. The people had seemingly turned into slow moving, flesh eating cannibals, something you'd see in the movies.

His sister is two years younger than John, and she just so happened to be shopping at the mall the day everything went downhill, and the infection began to spread. In her last hope of getting rescued she contacts John...

And we would start with the phone call made by the sister. (doesn't have to be his sister. Could be a girlfriend, or best friend, or whatever)